Lub ntsia hlau tsuas yog ib lub dav hlau inclined nyob ib ncig ntawm lub tog raj kheej. Txhawm rau piav qhia qhov no zoo dua, koj tuaj yeem saib nws li lub tog raj kheej nrog lub taub hau (khoom saum toj kawg nkaus) ntawm ib kawg thiab taw tes (zoo li tus ntsia thawv) ntawm lwm qhov kawg. Qhov tseem ceeb tshaj, nws muaj ridges winding nyob ib ncig ntawm nws. Lub sij hawm raug rau cov ridges (los yog grooves) nyob ib ncig ntawm lub ncej lossis lub tog raj kheej yog qhovxov.
Qhov kev ncua deb ntawm cov xov yog tib yam rau txhua tus ntsia hlau tab sis txawv ntawm lwm cov ntsia hlau. Qhov kev ncua deb ntawm cov xov yog hu ua aSuab.
Screws muaj txiaj ntsig los tuav cov khoom ua ke. Lawv tuaj yeem rub lossis thawb ib qho khoom ua ke. Lawv tuaj yeem siv los nqa cov khoom hnyav thiab ua kom nruj heev.
Ntsia thiab Ntsia Hlau
Ob tug no tsis zoo ib yam. Tsis zoo li tus ntsia thawv, ib tug ntsia hlau muaj ridges nyob ib ncig ntawm lub ncej. Nws yog ib qho nyuaj rau tsav lub hau ntswj mus rau hauv ib daim ntoo vim tias cov ridges ntawm cov ntsia hlau tsim muaj kev sib txhuam thiab ua haujlwm ntau. Yuav kom tsav lub hau ntswj mus rau hauv ntoo, nws yuav tsum tig mus rau hauv lub voj voog ncig los ntawm tus tsav tsheb.
Bolt:
Lub bolt yog ib hom ntsia hlau tab sis tsis muaj qhov taw qhia. Lub bolt tsis yog drilled rau hauv qhov chaw, tab sis theej, ib lub qhov yog ua rau lub bolt mus. Tom qab ntawd ib lub txiv ntoo muab tso rau hauv qhov kawg kom ntsia hlau ntsia hlau los ntawm. Bolts muaj zog los tuav cov khoom ua ke.Drill Bit:
Nws yog ib hom ntawm cov ntsia hlau uas tuaj yeem ua qhov hauv ntoo, yas, hlau, thiab pob zeb thaum txuas rau lub laum hluav taws xob. Zoo li kev xyaum tsis tu ncua, nws yog taw tes rau ntawm ib kawg, thiab nws muaj threads ib yam nkaus. Lub laum me ntsis muaj cov grooves sib sib zog nqus uas nqa cov ntoo ntawm lub qhov mus rau saum npoo thaum lub laum tig.
Piv txwv ntawm screws
Qee qhov piv txwv zoo ntawm cov ntsia hlau yog bolts, screws, lub raj mis saum, guitar tuners, teeb qhov muag teev, faucet kais dej, thiab cork openers. Koj puas tuaj yeem xav txog lub tshuab ntsia hlau hauv koj lub tsev?
Mechanical Advantage
Mechanical kom zoo dua nyob ntawm qhov chaw ntawm cov xov thiab qhov ntev (thiab thickness) ntawm cov ntsia hlau. Qhov ze ntawm cov xov yog, qhov ntau dua qhov zoo ntawm kev siv tshuab. Nws yooj yim dua rau kev tsav lub hau ntswj mus rau hauv ib qho khoom yog tias cov xov sib nrug me dua. Nws yuav siv sij hawm tsawg zog tab sis ntau lem. Yog hais tias qhov chaw nruab nrab ntawm cov xov yog dav, nws yog ib qho nyuaj rau tho ib tug ntsia hlau rau hauv ib yam khoom. Nws yuav siv zog ntau dua tab sis tsawg dua.